Door lock



FIG. 1 is a front elevational view of a door fastener showing our newdesign;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a front elevational view thereof, with the pin shown in analternative position.

The broken-line depiction of portions of a door and frame are forillustrative purposes only and form no part of the claimed design.

The ornamental design for a door lock, as shown and described.